Unrooting Reboot Issue

Hi All,
What should you do if you used Odin to unroot a Galaxy S3 and you are waiting for the phone to reboot (and you are supposedly finished) but it has been an hour and it´ still rebooting? Thanks in advance.

Hold the Home, Vol Down, the press power. When you see the recovery Android, let go of the two buttons. Then use Volume keys to select "Factory Wipe/Reset Data" use power button to select.

Then....When you see the setup wizard, I would power off, and flash with Odin one more time. With a good known image.

If you want to make sure, I can download the correct image files from Samsung for you. And tell you the best way. I just need you to PM me your model, serial number, and version off "Build Version" off the About phone screen.